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Filename Latest commit message Latest commit date
Jeff Parsons 0f06c3f039 The 5170 AT hard disk controller is limping along now, so I'm getting ready for a 1.15.4 release 
Some other interesting bugs were fixed along the way:
the Video component incorrectly assumed that masking a negative number with 0x80000000 would yield 0x80000000 (it actually yields -0x80000000, thank you JavaScript);
the ChipSet component provides a new addCMOSMemory() interface that RAM objects can use to bump the CMOS total to match the actual total;
the CPU properly implements INSW and OUTSW instructions now (kind of important for the AT hard disk controller)
2014-10-08 16:15:12 -07:00
..
1984-01-10.json The 5170 AT hard disk controller is limping along now, so I'm getting ready for a 1.15.4 release 2014-10-08 16:15:12 -07:00
1984-01-10.map The 5170 AT hard disk controller is limping along now, so I'm getting ready for a 1.15.4 release 2014-10-08 16:15:12 -07:00
README.md Updated the 5170 BIOS map, updated 8042 info, fixed some 8042 controller commands, made HLT work, and fixed the debugger's history buffer when executing a mix of real-mode and protected-mode instructions 2014-10-01 17:33:17 -07:00

README.md

From http://minuszerodegrees.net/bios/BIOS_5170_10JAN84_6MHZ/README.TXT:

This is the first BIOS for the IBM 5170.
It is dated 10JAN84.
It is found in type 1 motherboards running at 6 Mhz.

U27 has the IBM part number of 6181028, and is 32K in size
U47 has the IBM part number of 6181029, and is 32K in size

8 bit checksum of 6181028 = 36
8 bit checksum of 6181029 = CA
						    --
					added = 00

There are two BIN files in this ZIP file:

1. BIOS_5170_10JAN84_U27_6181028_27256_6MHZ.BIN  --> Use this to create a U27 using a 27256 EPROM (rated at 150nS or faster)
2. BIOS_5170_10JAN84_U47_6181029_27256_6MHZ.BIN  --> Use this to create a U47 using a 27256 EPROM (rated at 150nS or faster)

The JSON-encoded ROM image that PCjs uses was created using the FileDump command-line merge option:

filedump --file=http://static.pcjs.org/devices/pc/bios/5170/BIOS_5170_10JAN84_U27_6181028_27256_6MHZ.BIN --merge=http://static.pcjs.org/devices/pc/bios/5170/BIOS_5170_10JAN84_U47_6181029_27256_6MHZ.BIN --output=1984-01-10.json --overwrite

Since a MAP file (1984-01-10.map) exists as well, it is automatically appended to the JSON file (1984-01-10.json) when using a ROM input file (or JSON output file) with a matching filename.

It is also possible to create a merged binary ROM image (1984-01-10.rom) by adding --format=rom to the command-line (the default is --format=json).

These operations can only be performed using the FileDump command-line interface; the FileDump API does not support either the merge option or the appending of MAP data. For the moment, the API can only dump unadorned ROM images; eg:

http://www.pcjs.org/api/v1/dump/?file=http://static.pcjs.org/devices/pc/bios/5170/1984-01-10.rom